TJ-II:Compact Neutral Particle Analyzer

A Compact Neutral Particle Analyzer (CNPA), developed by the A.F. Ioffe Physical-Technical Institute, has been installed on TJ-II. ^[1] ^[2] ^[3] It detects H⁰ atoms in the energy range from 1 to 44 keV, and has 16 detection channels at fixed energy. It is installed in sector B1. This diagnostic is devoted to studying the high-energy tails during Neutral Beam Injection heating. ^[4]

The Compact Neutral Particle Analyzer / Charge Exchange Recombination Spectroscopy diagnostic at TJ-II

Diagram of the CNPA-CXRS diagnostic. Also shown is the Diagnostic neutral beam (NBDI).

References

[1] F.V. Chernyshev et al, Compact Neutral Particle Analyzer for plasma diagnostics, 30^th EPS Conference on Contr. Fusion and Plasma Phys. Vol. 27A (2003) P-4.71

[2] F.V. Chernyshev et al, A Compact Neutral-Particle Analyzer for Plasma Diagnostics, Instruments and Experimental Techniques 47, 2 (2004) 214-220

[3] J.M. Fontdecaba,S.Ya. Petrov, V.G. Nesenevich, A. Ros, F.V. Chernyshev, K.J. McCarthy and J.M. Barcala, Upgrade of the neutral particle analyzers for the TJ-II stellarator, Rev. Sci. Instrum. 85 (2014) 11E803

[4] R. Balbín et al, First Measurements of High-Energy Charge-Exchange Neutrals Using Compact Neutral Particle Analyser in TJ-II Stellarator, 32^nd EPS Conference on Plasma Phys. (Tarragona, 2005) ECA Vol.29C (2005) D-5.001

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